نتایج جستجو برای: River Engineering

تعداد نتایج: 344852  

Journal: :نشریه دانشکده فنی 0
احمد شکیبائی نیا امیررضا زراتی محمدرضا مجدزاده طباطبایی

most of river engineering problems are complicated and need to be analyzed by three dimensional models of flow and sediment transport. considering the fact that computers and numerical methods with great ability of flow and sediment transport simulation are developing quickly, using numerical modeling by engineers is inevitable. nevertheless, before application, numerical models need to be veri...

Ahmad Shakibaee Nia Amir Reza Zarrati Mohammad Reza Majd Zadeh Tabatabaee

Most of river engineering problems are complicated and need to be analyzed by three dimensional models of flow and sediment transport. Considering the fact that computers and numerical methods with great ability of flow and sediment transport simulation are developing quickly, using numerical modeling by engineers is inevitable. Nevertheless, before application, numerical models need to be veri...

Journal: :journal of agricultural science and technology 2015
f. javadi m. m. ahmadi k. qaderi

movement of sediment in the river causes many changes in the river bed. these changes are called bedform. river bedform has significant and direct effects on bed roughness, flow resistance, and water surface profile. thus, having adequate knowledge of the bedform is of special importance in river engineering. several methods have been developed by researchers for estimation of bed form dimensio...

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Rivers have a complicated and various condition in the diverse environment, and various science such as Hydrology, geomorphology, hydraulic, ecology and engineering have it been discussed. River geomorphology with studying of river process and landforms, examination of river landscape evolution, can be playing an important role in identifying of river channel character and behavior. To order th...

Journal: :آب و توسعه پایدار 0
آرمین بوستانی کاظم اسماعیلی

rivers are among the most important surface water resources which have always been of significance throughout the history of mankind. this significance is due to human dependence on water for answering his needs such as agriculture, water transfer, flood control and water transportation. in the past, it was assumed that basic measures such as exploiting rivers or managing floods were only limit...

Journal: :journal of rehabilitation in civil engineering 2014
mohammad mehdi razmi mojtaba sanei cyrus ershadi

scour around hydraulic structures is an inevitable phenomenon . recognition of this phenomenon and dealing with it is an issue considering which will ensure the project success . local scour at piers has been reported as the most important factor in the destruction of the bridges . the use of submerged and non-submerged piles is one of the scour control methods . submerged piles have been rarel...

A پارسائی, K Ghaderi M.M Ahmadi

Study in surface water quality is important. Rivers are one of the main sources of water supply fordrinking, agriculture and industry. Unfortunately, sometime Rivers where wastewater dischargesare considered. For this reason,the pollutant transmission in river is one of the most importantproblems in Environmental Engineering. the Advection Dispersion Equation (ADE) is governedon the pollutant t...

2016
Zhaojun Song Jianping Li Zhenkui Gu Wenjia Tang Jifeng Yu Luo Gao

Original scientific paper Studies on the evolution of paleo-channels in coastal areas are important for submarine engineering construction and to reveal changes in the global paleoenvironment. Thus, to explore the characteristics of paleo-channels during the late Last Glaciation in the western South Yellow Sea, digital terrain analysis method and ArcGis river extraction function were employed, ...

دهقانی, رضا, قربانی, محمدعلی,

     Electrical conductivity (EC) is an important factor in river engineering, especially studying of river water quality. In this study we studied and evaluated wavelet neural network to predict the electrical conductivity of the Kakareza river (in lorestan), and the results were compared with results of artificial neural network model. For this purpose, hydrogen carbonate, chloride, sulfate, ...

اکبری فرد, سعید, علیان‌نژاد, مریم, قادری, کورش,

Flood routing in river is one of important issues in water engineering projects. Hydraulic routing is common in especially in river that has branches and river that have not basin information. So as to need obtain cross section and slops in all interval of river that Muskingum helps by saving time and cost. In this paper, a Water Cycle Algorithm (WCA) is proposed for the parameter estimation of...

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